/usr/share/ubiquity-slideshow/slides/l10n/oc/ is in ubiquity-slideshow-edubuntu 113.
This file is owned by root:root, with mode 0o755.
..
/usr/share/ubiquity-slideshow/slides/l10n/oc/accessibility.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/arkose.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/calc.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/calibre.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/desktop-software.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/documentation.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/edubuntu-menu-editor.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/empathy.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/epoptes.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/fonts.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/freemind.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/gbrainy.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/installing-software.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/kdeedu.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/librecad.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/ltsp.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/pencil.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/testdrive.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/tomboy.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/tux4kids.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/underthehood.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/vym.html
/usr/share/ubiquity-slideshow/slides/l10n/oc/welcome.html